From 2bb2c32e8ed5642a5bf3ba1e8c49e10cecc88905 Mon Sep 17 00:00:00 2001 From: David Robertson Date: Mon, 31 Oct 2022 13:02:07 +0000 Subject: Avoid incrementing bg process utime/stime counters by negative durations (#14323) --- tests/metrics/test_background_process_metrics.py | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 tests/metrics/test_background_process_metrics.py (limited to 'tests/metrics/test_background_process_metrics.py') diff --git a/tests/metrics/test_background_process_metrics.py b/tests/metrics/test_background_process_metrics.py new file mode 100644 index 0000000000..f0f6cb2912 --- /dev/null +++ b/tests/metrics/test_background_process_metrics.py @@ -0,0 +1,19 @@ +from unittest import TestCase as StdlibTestCase +from unittest.mock import Mock + +from synapse.logging.context import ContextResourceUsage, LoggingContext +from synapse.metrics.background_process_metrics import _BackgroundProcess + + +class TestBackgroundProcessMetrics(StdlibTestCase): + def test_update_metrics_with_negative_time_diff(self) -> None: + """We should ignore negative reported utime and stime differences""" + usage = ContextResourceUsage() + usage.ru_stime = usage.ru_utime = -1.0 + + mock_logging_context = Mock(spec=LoggingContext) + mock_logging_context.get_resource_usage.return_value = usage + + process = _BackgroundProcess("test process", mock_logging_context) + # Should not raise + process.update_metrics() -- cgit 1.5.1